Green’s Dictionary of Slang

hot damn! excl.

also hot dammit! hot dang!
[var. on God-damn! excl.]

(US) a general excl., usu. implying pleasure rather than fury.

[US]H. Wiley Wildcat 80: ‘Hot damn!’ he exclaimed.
[US](con. late 1920s) L. Hughes Little Ham III i : Well, hot-damn!
[US]W.D. Overholser Buckaroo’s Code (1948) 15: Hod [sic] dang it, Cotton, why didn’t we eat at Charlies?
[US](con. 1943–5) A. Murphy To Hell and Back (1950) 119: ‘This woman’s a snowball [...] She’s fulla dope.’ ‘Hod damn [...] who’da thought it?’.
[US] ‘Ball of the Freaks’ in D. Wepman et al. Life (1976) 110: ‘Hot damn!’ cried the faggots as they dig the maggots / Crawling out of that bitch’s hips.
[US]H. Rhodes Chosen Few (1966) 16: ‘Hot dammit!’ he cursed, rubbing his knee.
[US]N. Heard Howard Street 68: ‘Hot damn!’ Brother shouted joyously.
[US]B. Moyers Listening to America 26: ‘Hot dang,’ someone says.
[US]A. Maupin Tales of the City (1984) 19: Hot damn. This place is Pickup City tonight.
[US]P. Califia Macho Sluts 44: Did that really happen? Hot damn! And I think I’m wicked and perverse.
[UK]J. Cameron It Was An Accident 189: Hot damn! Now we got to think up some other scheme.
[US]C. Cook Robbers (2001) 23: Hot damn [...] Look out Houston, here we come.